<template>

  <el-container class="home-container">
    <!-- 侧边栏 -->
    <el-aside :width="isCollapse ? '64px' : '200px'">
      <!-- 侧边栏菜单区域 -->
      <el-menu background-color="#333744" text-color="#fff" active-text-color="#359af8" unique-opened
               :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
        <el-menu-item index="/welcome" @click="saveNavState('/welcome')">
          <i class="iconfont iconyibiaopan"></i>
          <span>仪表盘</span>
        </el-menu-item>
        <!-- 一级菜单 -->
        <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
          <!-- 一级菜单的模板区域 -->
          <template slot="title">
            <i :class="iconsObj[item.id]"></i>
            <span>{{item.authName}}</span>
          </template>
          <!-- 二级菜单 -->
          <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id"
          @click="saveNavState('/' + subItem.path)">
            <template slot="title">
              <i class="el-icon-menu"></i>
              <span>{{subItem.authName}}</span>
            </template>
          </el-menu-item>
        </el-submenu>
      </el-menu>
    </el-aside>
    <el-container>
      <!-- 头部区域 -->
      <el-header>
        <div @click="isCollapseFunc">
          <img src="../assets/docker.png" alt="">
          <span>后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button>
      </el-header>
      <!-- 右侧主体 -->
      <el-main>
        <!-- 主体区域的路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  name: 'Home',
  data() {
    return {
      // 左侧菜单数据
      menuList: [],
      iconsObj: {
        125: 'iconfont iconyonghu',
        103: 'iconfont iconquanxian',
        101: 'iconfont iconshangpin',
        102: 'iconfont iconicon',
        145: 'iconfont icontongji'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.menuList = res.data
    },
    // 点击事件：切换菜单的折叠与展开
    isCollapseFunc() {
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 10px;
  align-items: center;
  color: #ffffff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  };
}

.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}

.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
</style>
